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            <small>
              <a href="#Procedure">Procedure<br></a>
              <a href="#Abstract">Abstract<br></a>
              <a href="#Required_Reading">Required_Reading<br></a>
              <a href="#Keywords">Keywords<br></a>
              <a href="#Brief_I/O">Brief_I/O<br></a>
              <a href="#Detailed_Input">Detailed_Input<br></a>

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              <small>               <a href="#Detailed_Output">Detailed_Output<br></a>
              <a href="#Parameters">Parameters<br></a>
              <a href="#Exceptions">Exceptions<br></a>
              <a href="#Files">Files<br></a>
              <a href="#Particulars">Particulars<br></a>
              <a href="#Examples">Examples<br></a>

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              <small>               <a href="#Restrictions">Restrictions<br></a>
              <a href="#Literature_References">Literature_References<br></a>
              <a href="#Author_and_Institution">Author_and_Institution<br></a>
              <a href="#Version">Version<br></a>
              <a href="#Index_Entries">Index_Entries<br></a>
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<h4><a name="Procedure">Procedure</a></h4>
<PRE>
   SpiceDouble vnormg_c ( ConstSpiceDouble   * v1,
                          SpiceInt             ndim ) 

</PRE>
<h4><a name="Abstract">Abstract</a></h4>
<PRE>
 
   Compute the magnitude of a double precision vector of arbitrary 
   dimension. 
 </PRE>
<h4><a name="Required_Reading">Required_Reading</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Keywords">Keywords</a></h4>
<PRE>
 
   VECTOR 
 

</PRE>
<h4><a name="Brief_I/O">Brief_I/O</a></h4>
<PRE>
 
   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
    v1        I     Vector whose magnitude is to be found. 
    ndim      I     Dimension of v1. 
 </PRE>
<h4><a name="Detailed_Input">Detailed_Input</a></h4>
<PRE>
 
   v1      This may be any double precision vector or arbitrary 
           size. 
 </PRE>
<h4><a name="Detailed_Output">Detailed_Output</a></h4>
<PRE>
 
   <b>vnormg_c</b> is the magnitude of v1 calculated in a numerically stable 
   way. 
 </PRE>
<h4><a name="Parameters">Parameters</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Exceptions">Exceptions</a></h4>
<PRE>
 
   1)  If ndim is not physically realistic, greater than zero, a
       BADDIMENSION error is signaled.  The value 0. is returned.
 </PRE>
<h4><a name="Files">Files</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Particulars">Particulars</a></h4>
<PRE>
 
   <b>vnormg_c</b> finds the component of v1 whose magnitude is the largest. 
   If the absolute magnitude of that component indicates that a 
   numeric overflow would occur when it is squared, or if it 
   indicates that an underflow would occur when squared (falsely 
   giving a magnitude of zero) then the following expression is 
   used: 
 
   <b>vnormg_c</b> = v1max * MAGNITUDE OF [ (1/v1max)*v1 ] 
 
   therwise a simpler expression is used: 
 
   <b>vnormg_c</b> = MAGNITUDE OF [ v1 ] 
 
   Beyond the logic described above, no further checking of the 
   validity of the input is performed. 
 </PRE>
<h4><a name="Examples">Examples</a></h4>
<PRE>
 
   The following table show the correlation between various input 
   vectors v1 and <b>vnormg_c</b>: 
 
   ndim   v1                       ndim        <b>vnormg_c</b> 
   ----------------------------------------------------------------- 
   1      (-7.0D20)                 1            7.D20 
   3      (1., 2., 2.)              3            3. 
   4      (3., 3., 3., 3.)          4            6. 
   5      (5., 12., 0., 0., 0.)     5            13. 
   3      (-5.D-17, 0.0, 12.D-17)   3            13.D-17 
 </PRE>
<h4><a name="Restrictions">Restrictions</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Literature_References">Literature_References</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Author_and_Institution">Author_and_Institution</a></h4>
<PRE>
 
   W.M. Owen       (JPL) 
 </PRE>
<h4><a name="Version">Version</a></h4>
<PRE>
 
   -CSPICE Version 1.1.0, 22-OCT-1998 (NJB)

      Made input vector const.

   -CSPICE Version 1.0.0, 1-APR-1998   (EDW)
</PRE>
<h4><a name="Index_Entries">Index_Entries</a></h4>
<PRE>
 
   norm of n-dimensional vector 
 </PRE>
<h4>Link to routine vnormg_c source file <a href='../../../src/cspice/vnormg_c.c'>vnormg_c.c</a> </h4>

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   <pre>Wed Jun  9 13:05:32 2010</pre>

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